Cooling tool for pole welding

Abstract

The utility model belongs to the technical field of batteries, and discloses a cooling tool for pole welding, which comprises a cooling part and a sealing plate, the cooling part is provided with a cavity for circulating cooling liquid, the sealing plate separates the cavity from the external environment, and one side of the sealing plate deviating from the cavity is provided with a cooling groove so as to transfer heat of the groove bottom and / or the side wall of the cooling groove to the cooling liquid. When the pole is placed in the cooling tank and the pole and the connecting piece are welded, heat emitted by the pole is absorbed by the tank bottom and / or the side wall of the cooling tank and is transferred to the cooling liquid, and the cooling liquid absorbs and takes away the heat, so that the pole is cooled, and the probability that the sealing ring is fused due to heat generated by welding is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a cooling tooling for pole column welding. Background Technique

[0002] In the process of battery manufacturing, welding is a key technology, mainly used to connect various parts of the battery together. However, a large amount of heat is generated during the welding process. When welding the pole column and the connecting piece, the heat generated by welding may cause the sealing ring sleeved on the pole column to melt, thus affecting the performance and safety of the battery.

[0003] The prior art usually solves the above technical problems by reducing the heat generated by welding or changing the material of the sealing ring. For example, adjusting welding parameters such as welding speed or laser power to reduce the heat generated by welding, adding a cooling device to the welding equipment to reduce the heat generated by welding, and using high-temperature resistant materials to make the sealing ring, etc.

[0004] However, the above methods of reducing the heat generated by welding often reduce the welding quality and welding efficiency, and the method of changing the material of the sealing ring will increase the production cost.

[0005] Therefore, it is urgent to propose a cooling tooling for pole column welding to solve the above technical problems. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a cooling tooling for pole column welding, which can cool the pole column when welding the pole column and the connecting piece.

[0007] To achieve this purpose, the utility model adopts the following technical solutions:

[0008] A cooling tooling for pole column welding, comprising:

[0009] A cooling part, the cooling part has a cavity for circulating coolant;

[0010] A sealing plate, the sealing plate separates the cavity from the external environment;

[0011] A cooling groove is provided on the side of the sealing plate facing away from the cavity, so as to transfer the heat of the bottom and / or side wall of the cooling groove to the coolant.

[0012] Optionally, the sealing plate protrudes from the side facing away from the cavity towards the inside of the cavity to form a cooling groove.

[0013] Optionally, the cooling groove is provided with a heat dissipation structure.

[0014] Optionally, the heat dissipation structure includes a protruding part protruding from at least one of the outer bottom wall and the outer side wall of the cooling groove, and the protruding part is a heat conducting member.

[0015] Optionally, the heat dissipation structure includes a groove formed in at least one of the outer bottom wall and the outer side wall of the cooling tank.

[0016] Optionally, a plurality of cooling tanks are provided on the side of the sealing plate facing away from the cavity.

[0017] Optionally, the cavity includes a plurality of independent sub-cavities, and the plurality of sub-cavities correspond to the plurality of cooling tanks one by one.

[0018] Optionally, the cooling tank is a profiling groove, and the profiling groove is adapted to the outer shape of the terminal post.

[0019] Optionally, an elastic heat conducting member is provided in the cooling tank; the elastic heat conducting member is arranged at the bottom of the cooling tank so that the elastic heat conducting member can be pressed between the bottom of the cooling tank and the terminal post.

[0020] Optionally, the elastic heat conducting member is also arranged on the inner side wall of the cooling tank so that the elastic heat conducting member can be pressed between the inner side wall of the cooling tank and the terminal post.

[0021] Advantages of the present utility model:

[0022] The cooling tooling for terminal post welding provided by the present utility model places the terminal post in the cooling tank. When welding the terminal post and the connecting piece, the heat generated by the terminal post is absorbed by the bottom and / or side wall of the cooling tank and transferred to the coolant, and the coolant absorbs and takes away this part of the heat, thereby realizing the cooling of the terminal post. This tooling does not need to change the welding parameters and the material of the sealing ring, nor does it need to add a cooling device to the welding equipment, and can reduce the probability of the sealing ring being melted due to welding heat, providing a strong guarantee for the performance and safety of the battery. Description of the drawings

[0023] Figure 1 is a schematic structural diagram of the cooling tooling for terminal post welding provided by an embodiment of the present utility model Figure 1 ;

[0024] Figure 2 is a schematic structural diagram of the cooling tooling for terminal post welding provided by an embodiment of the present utility model Figure 2 ;

[0025] Figure 3 is a schematic structural diagram of the protruding part provided by an embodiment of the present utility model;

[0026] Figure 4 is a schematic structural diagram of the cooling tooling for terminal post welding provided by an embodiment of the present utility model Figure 3 。

[0027] In the figure:

[0028] 100. Cooling part; 110. Cavity; 111. Sub-cavity; 112. Liquid inlet; 113. Liquid outlet; 200. Sealing plate; 210. Cooling tank; 211. Outer bottom wall; 212. Outer side wall; 213. Protrusion; 214. Elastic heat conducting member;

[0029] 10. Battery cover plate; 20. Terminal post. Specific embodiments

[0030] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the sake of description, only the parts related to the present utility model rather than all the structures are shown in the drawings.

[0031] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0032] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above and over", and "on the top of" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below and under", and "under the bottom of" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicating that the horizontal height of the first feature is lower than that of the second feature.

[0033] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meanings.

[0034] This embodiment provides a cooling tooling for terminal post welding, which can cool the terminal post when welding the terminal post and the connecting piece.

[0035] Specifically, as Figure 1 and Figure 2 shown, the cooling tooling for pole welding includes a cooling part 100 and a sealing plate 200. Among them, the cooling part 100 has a cavity 110 for circulating coolant, the sealing plate 200 separates the cavity 110 from the external environment, and a cooling groove 210 is provided on the side of the sealing plate 200 facing away from the cavity 110, so as to transfer the heat of the bottom and / or side wall of the cooling groove 210 to the coolant.

[0036] Based on the above design, when the pole 20 is placed in the cooling groove 210 and the pole 20 and the connecting piece are welded, the heat generated by the pole 20 is absorbed by the bottom and / or side wall of the cooling groove 210 and transferred to the coolant. The coolant absorbs and takes away this part of the heat, thereby realizing the cooling of the pole 20. This tooling does not need to change the welding parameters and the material of the sealing ring, nor does it need to add a cooling device to the welding equipment, which can reduce the probability of the sealing ring being melted due to welding heat, providing a strong guarantee for the performance and safety of the battery.

[0037] It should be noted that the above coolant can be cooling water or refrigerant, etc., which is not limited here.

[0038] Furthermore, a liquid inlet 112 and a liquid outlet 113 are provided on the cooling part 100. Both the liquid inlet 112 and the liquid outlet 113 are communicated with the cavity 110. The liquid inlet 112 is communicated with the liquid outlet end of a cooling device (not shown in the figure), and the liquid outlet 113 is communicated with the liquid inlet end of the cooling device. After the cooling device cools the coolant, the coolant enters the cavity 110 through the liquid outlet end of the cooling device and the liquid inlet 112 in sequence. After the coolant absorbs heat in the cavity 110, it discharges from the liquid outlet 113 out of the cavity 110 and enters the cooling device through the liquid inlet end of the cooling device for cooling, thereby realizing the circulating flow of the coolant in the cavity 110.

[0039] Furthermore, the side of the cooling part 100 facing away from the cavity 110 is a solid structure, which can save the amount of coolant on the one hand and increase the flow rate of the coolant in the cavity 110 on the other hand, thereby improving the cooling efficiency of the pole 20.

[0040] Optionally, as Figure 1 and Figure 2 shown, the sealing plate 200 protrudes from the side facing away from the cavity 110 towards the inside of the cavity 110 to form the cooling groove 210. In actual production, the sealing plate 200 can be stamped to form the cooling groove 210 on the sealing plate 200. This structural design not only simplifies the production process of the sealing plate 200, but also shortens the heat transfer path between the pole 20 to be cooled in the cooling groove 210 and the coolant in the cavity 110 as much as possible, which is beneficial to improving the cooling efficiency of the pole 20.

[0041] Optionally, asFigure 1 and Figure 2 As shown in Figure 2 , the cooling groove 210 is a profiling groove, which is adapted to the outer shape of the terminal post 20. After the terminal post 20 is placed in the cooling groove 210, the bottom and inner wall of the cooling groove 210 can be fitted with the terminal post 20, so that the bottom and inner wall of the cooling groove 210 can transfer heat efficiently with the terminal post 20.

[0042] Optionally, as Figure 1 and Figure 2 shown, an elastic heat conducting member 214 is provided in the cooling groove 210. The elastic heat conducting member 214 is arranged at the bottom of the cooling groove 210. After the terminal post 20 is placed in the cooling groove 210, the elastic heat conducting member 214 can be pressed between the bottom of the cooling groove 210 and the terminal post 20 to improve the heat transfer efficiency between the bottom of the cooling groove 210 and the terminal post 20.

[0043] Furthermore, the elastic heat conducting member 214 can be an element with certain elasticity and high thermal conductivity such as heat conducting silica gel.

[0044] Furthermore, the elastic heat conducting member 214 is also arranged on the inner side wall of the cooling groove 210. After the terminal post 20 is placed in the cooling groove 210, the elastic heat conducting member 214 located at the bottom of the cooling groove 210 is pressed between the bottom of the cooling groove 210 and the terminal post 20, and the elastic heat conducting member 214 located on the inner side wall of the cooling groove 210 is pressed between the inner side wall of the cooling groove 210 and the terminal post 20, which has the effect of further improving the heat transfer efficiency between the bottom of the cooling groove 210 and the terminal post 20.

[0045] Optionally, as Figures 1 to 3 shown, the cooling groove 210 is provided with a heat dissipation structure to increase the heat transfer element between the terminal post 20 in the cooling groove 210 and the coolant in the cavity 110 and improve the cooling efficiency.

[0046] Furthermore, as Figures 1 to 3 shown, the heat dissipation structure includes protruding parts 213 protruding from the outer bottom wall 211 and the outer side wall 212 of the cooling groove 210. The protruding parts 213 are heat conducting members, and all the protruding parts 213 are immersed in the coolant, thereby increasing the heat exchange volume with the coolant and achieving the effect of improving the cooling efficiency of the terminal post 20. In this embodiment, the protruding parts 213 are solid metal columns with good thermal conductivity such as aluminum or copper. Of course, the protruding parts 213 can also be hollow metal columns or metal bumps, etc. And, in other implementation schemes, the heat dissipation structure can also be provided only on the outer bottom wall 211 of the cooling groove 210, or only on the outer side wall 212 of the cooling groove 210, which can be determined according to the actual application requirements and production conditions.

[0047] In another embodiment, the heat dissipation structure includes a groove formed in at least one of the outer bottom wall 211 and the outer side wall 212 of the cooling tank 210. The design of the groove can increase the heat exchange area between the outer bottom wall 211 and / or the outer side wall 212 of the cooling tank 210 and the coolant, thereby improving the cooling efficiency of the pole column 20.

[0048] Optionally, as Figures 1 to 4 shown, a plurality of cooling tanks 210 are provided on the side of the sealing plate 200 facing away from the cavity 110. Accordingly, a plurality of pole columns 20 can be respectively placed in a corresponding one of the cooling tanks 210, achieving the effect of simultaneously cooling the plurality of pole columns 20.

[0049] Furthermore, as Figures 1 to 4 shown, the cavity 110 includes a plurality of independent sub-cavities 111, and coolant flows through each sub-cavity 111. Thus, the coolant in each sub-cavity 111 does not interfere with each other. The plurality of sub-cavities 111 correspond to the plurality of cooling tanks 210 one by one to ensure the heat exchange efficiency between the pole column 20 in each cooling tank 210 and the coolant in the corresponding sub-cavity 111.

[0050] Furthermore, as Figures 1 to 4 shown, each sub-cavity 111 corresponds to a liquid inlet 112 and a liquid outlet 113 to realize the circulation of the coolant in each sub-cavity 111. In this embodiment, the number of the cooling tanks 210, the sub-cavities 111, the liquid inlets 112, and the liquid outlets 113 is two and they correspond to each other one by one. In other embodiments, the number of the cooling tanks 210, the sub-cavities 111, the liquid inlets 112, and the liquid outlets 113 can also be three, four, five, etc., which will not be listed one by one here.

[0051] The working process of the cooling tooling for pole column welding provided in this embodiment will be briefly described below:

[0052] Please refer to Figures 1 to 4 , place the battery cover plate 10 on the surface of the sealing plate 200 on the side facing away from the cavity 110, and place the two pole columns 20 on the battery cover plate 10 in corresponding cooling tanks 210 respectively. Weld the pole column 20 to the connecting piece. The pole column 20 transfers heat to the coolant in the sub-cavity 111. The coolant that has absorbed the heat of the pole column 20 is discharged from the liquid outlet 113, and after being cooled by the cooling device, it re-enters the sub-cavity 111 from the liquid inlet 112. Thus, efficient cooling of the pole column 20 is achieved ( Figure 4 the dotted line and the arrow direction in

[0053] Obviously, the above embodiments of the present utility model are merely examples for clearly illustrating the present utility model, rather than limitations on the implementation manners of the present utility model. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present utility model. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the claims of the present utility model.

Claims

1. A cooling device for pole welding, characterized in that: include: A cooling portion (100), wherein the cooling portion (100) has a cavity (110) for circulating a cooling liquid; A sealing plate (200), wherein the sealing plate (200) separates the cavity (110) from the external environment; A cooling groove (210) is provided on a side of the sealing plate (200) facing away from the cavity (110) so as to transfer heat from the bottom and / or side wall of the cooling groove (210) to the cooling liquid.

2. The cooling device for pole welding according to claim 1, characterized in that: The sealing plate (200) protrudes from a side away from the cavity (110) toward the interior of the cavity (110), thereby forming the cooling groove (210).

3. The cooling device for pole welding according to claim 2, characterized in that: The cooling groove (210) is provided with a heat dissipation structure.

4. The cooling device for pole welding according to claim 3, characterized in that: The heat dissipation structure comprises a protruding portion (213) protruding from at least one of an outer bottom wall (211) and an outer side wall (212) of the cooling groove (210), and the protruding portion (213) is a heat conducting member.

5. The cooling device for pole welding according to claim 3, characterized in that: The heat dissipation structure comprises a groove opened in at least one of the outer bottom wall (211) and the outer side wall (212) of the cooling groove (210).

6. The cooling device for pole welding according to any one of claims 1 to 5, characterized in that: A plurality of cooling grooves (210) are provided on a side of the sealing plate (200) facing away from the cavity (110).

7. The cooling device for pole welding according to claim 6, characterized in that: The cavity (110) comprises a plurality of mutually independent sub-cavities (111), and the plurality of sub-cavities (111) correspond one-to-one to the plurality of cooling grooves (210).

8. The cooling device for pole welding according to any one of claims 1 to 5, characterized in that: The cooling groove (210) is a contoured groove adapted to the shape of the pole (20).

9. The cooling device for pole welding according to any one of claims 1 to 5, characterized in that: An elastic heat-conducting member (214) is provided in the cooling groove (210); the elastic heat-conducting member (214) is arranged at the groove bottom of the cooling groove (210) so that the elastic heat-conducting member (214) can be pressed between the groove bottom of the cooling groove (210) and the pole (20).

10. The cooling device for pole welding according to claim 9, characterized in that: The elastic heat-conducting member (214) is also arranged on the inner side wall of the cooling groove (210), so that the elastic heat-conducting member (214) can be pressed between the inner side wall of the cooling groove (210) and the pole (20).

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